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wlan0 does not exists ?

I have a GN-WI07ht-rh card. It worked fine and the card showed up as wlan0. I was testing packet injection and it was fine. I then tested fake authentication. Which seemed to fail. Then I tried kismet and got a whole bunch of errors.

But now, when I restart my computer, I can not seem to get wlan0 up (ie: ifconfig wlan0 up, gives me an error message about not existing. airmon-ng commands can't get wlan0 running either.)

sorry. I'm running bt4 pre-final on my hard drive. My wlan0 was working fine for 3 weeks, it was only today that I was playing around with packet injection, fake authentication, installing madwifi-tools, uninstalling madwifi-tools and then trying to run kismet. Somewhere after playing with the madwifi-tools installation and running kismet is where I lost my wlan0.

I tried turning off and on the wifi button (but nothing happens.) If I boot up to vista, my wifi works, so I know the button is on the "on" position.

Incidently, if I boot up with the bt4 pre-final DVD, I do see my wlan0 interface card and I can use it. But when booting up from my hard drive, I can not bring up my wlan0 card (it's missing from the list when I type ifconfig or iwconfig. When I type ifconfig wlan0 up I get a message saying that "interface wlan0 does not exist")

My wlan0 card is an atheros. I also have an external usb wifi card. I used the external wifi card to update the repositories and then used synaptic package manager to install madwifi-drivers. Rebooted and now my internal atheros card is properly being seen by bt4 pre-release. (After the update, my atheros card shows up as ath0, instead of wlan0 - which I'm glad.)

I'll give this a try later to see if it works for me also. As i'm used to typing ath0 rather than wlan0

Edit:- This does work, however.

I found if you install the drivers with tools and other packages it fails to show on a reboot. The way around this is to go back into synaptic after the reboot and tell it to reinstall the drivers again.
After a reboot you can find ath0 in iwconfig

Also if your using wicd remember to edit the prefs so it uses ath0 and not the old wlan0.